Improvement in machines foe boeing hubs



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Letters Patent No. 77,137, dated April 21, 1868.

`IMPROVEMENT IN MACHINES POR BORING HUBS.

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T0 ALL WHOM AIT MAY GONCERN@ A Be it known that LiIonN W. WALTERS, ofRieeville, in the county of Mitchell, and State of Iowa, have invented anew and improvedR-eaming-Machine; and I do hereby declare that thefollowing is afullhclearr,-

and lexact description thereof, whichwill enable those skilled in theart to make and use the same, reference being had to the accompanyingdrawings, forming part of this specification.

This invention relates to an improved roaming-machine. It consists of acutting-tool, having a thread on its shank, setting into a box in whichis a vertical-toothed or mitre-wheel, having an inside threadpcorresponding with thatpon the shank of the cutting-tool.

A crown or mitre-gear, solidly secured to the vbottom of a hollow shaftor sleeve, sui-mounted by a lhandwheel, operates the inside-'threadedgear-wheel, for the purpose of adjusting the cutting-tool asdesired. Af

rod, securely attached to the bottom of the box in which thecutting-tool is carried, screws into a clamp, while the upper clampslides looselyon'the hollow shatter sleeve, and another rod securelyattached to top of said box, passes through said sleeve, and is operatedby a handleconnected to and released from th'ehand-wheel, by a suitabledevice, as desired. In the accompanying drawings- Figure 1 is a verticalsection of my improved reamer, and 5 Figure 2 is a view,.on a largerscale, of the crown-gear and its attachments.

Similar letters of reference indicate corresponding parts.

Ais a threaded shaft, solidly attached to the metal boxvB. C is'thelower clamp; which is most conveniently made three-armed, having a-female thread, into which the shaft A works, and clamping the hub D bythe set-screws c c. y 4

The cutting-tool E tits into the metal box B, and its shank is providedwith a' thread, e, upon which works the verticaltoothed wheel F, 'or anequivalent'gear-wheel, within the box B. t

G, in the present instance, is a crown-gear wheel, which engages withthe toothed wheel F, and carries the hollow shaft or\sleeve H;surmounted by the hand-wheel L'.

The shaft K, having attached to it, at the top, the handle L, is solidlysecured to the topof the box B, and

passes' through the sleeve H, so thatth'e threaded shaft A,`boz Bandshaft K, always operate together as one piece. l v

The upper clamp, C', slides loosely on the hollow shaftH, and is clampedto the hub by sct-screws c e.

The hand-wheell is provided with holes in its rim, into which sets thopinl, to hold the handle L and its `attachments to the hand-wheel I, andits attachments, when desired; and the cutting-tool being adjusted, aspresently mentioned, and the reamer attached and clamped to the hub, byturning the handle L, the reamer is operated, and the threaded shaft Ascrewed into thelower clamp C, the shaft H at the same time descendingthrough the loose upper 'clamp C.' v j The pin Z, which is attached tothe under side of the spring M, passes through the handle L, andhand-wheel I, and a bent lever, N, having its fulcrum in said handle L,at n, raises the pin Z out of thehand-wheehenabling the hand-wheel andits attachments to beta1-ned for the purpose of adjusting. thecutting-tool, while'the'lliandle L andits attachments reinainstationary, thus operating the toothed wheel Fupon the thread of theshank e,-

of the cutting-tool E, and projecting or retiring said cutting-tool, asdesired.

The threaded shaft A should equal or slightly'exceed in 'length thedistance 'from the bottom of the box v Btc the hand-wheel I..

I claim as new, and desire to secure by Letters Patent- The combinationof the two shafts A K,fthc latter having the crown-gear wheel G, tubularshaft H, box B, adjustable 4cutter E, having the pinion F, all operatingas described for the purpose specified. VJOHN W. WALTERS. Witnesses:

DAVID WYLIE, F. FnLtows.

